xref: /illumos-gate/usr/src/uts/intel/sys/pcb.h (revision ed093b41)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright 2020 Joyent, Inc.
25  */
26 
27 #ifndef _SYS_PCB_H
28 #define	_SYS_PCB_H
29 
30 #include <sys/regset.h>
31 #include <sys/segments.h>
32 #ifndef _ASM
33 #include <sys/fp.h>	/* kfpu_t */
34 #endif
35 
36 #ifdef	__cplusplus
37 extern "C" {
38 #endif
39 
40 #ifndef _ASM
41 typedef struct fpu_ctx {
42 	kfpu_t		fpu_regs;	/* kernel save area for FPU */
43 	uint64_t	fpu_xsave_mask;	/* xsave mask for FPU/SSE/AVX */
44 	uint_t		fpu_flags;	/* FPU state flags */
45 	void		*fpu_signal;	/* copyin area for signal handling */
46 } fpu_ctx_t;
47 
48 typedef struct pcb {
49 	fpu_ctx_t	pcb_fpu;	/* fpu state */
50 	uint_t		pcb_flags;	/* state flags; cleared on fork */
51 	greg_t		pcb_drstat;	/* status debug register (%dr6) */
52 	unsigned char	pcb_instr;	/* /proc: instruction at stop */
53 	unsigned char	pcb_rupdate;	/* new register values in pcb -> regs */
54 	uintptr_t	pcb_fsbase;
55 	uintptr_t	pcb_gsbase;
56 	selector_t	pcb_ds;
57 	selector_t	pcb_es;
58 	selector_t	pcb_fs;
59 	selector_t	pcb_gs;
60 	user_desc_t	pcb_fsdesc;	/* private per-lwp %fs descriptors */
61 	user_desc_t	pcb_gsdesc;	/* private per-lwp %gs descriptors */
62 } pcb_t;
63 
64 #endif /* ! _ASM */
65 
66 /* pcb_flags */
67 #define	DEBUG_PENDING	0x02	/* single-step of lcall for a sys call */
68 #define	PRSTOP_CALLED	0x04	/* prstop() has been called for this lwp */
69 #define	INSTR_VALID	0x08	/* value in pcb_instr is valid (/proc) */
70 #define	NORMAL_STEP	0x10	/* normal debugger-requested single-step */
71 #define	WATCH_STEP	0x20	/* single-stepping in watchpoint emulation */
72 #define	CPC_OVERFLOW	0x40	/* performance counters overflowed */
73 #define	REQUEST_STEP	0x100	/* request pending to single-step this lwp */
74 #define	REQUEST_NOSTEP	0x200	/* request pending to disable single-step */
75 #define	ASYNC_HWERR	0x400	/* hardware error has corrupted context  */
76 
77 /* pcb_rupdate values */
78 #define	PCB_UPDATE_SEGS	0x01	/* Update segment registers */
79 #define	PCB_UPDATE_FPU	0x02	/* Update FPU registers */
80 
81 #define	PCB_SET_UPDATE_SEGS(pcb)	((pcb)->pcb_rupdate |= PCB_UPDATE_SEGS)
82 #define	PCB_SET_UPDATE_FPU(pcb)		((pcb)->pcb_rupdate |= PCB_UPDATE_FPU)
83 #define	PCB_NEED_UPDATE_SEGS(pcb)	\
84 	(((pcb)->pcb_rupdate & PCB_UPDATE_SEGS) != 0)
85 #define	PCB_NEED_UPDATE_FPU(pcb)	\
86 	(((pcb)->pcb_rupdate & PCB_UPDATE_FPU) != 0)
87 #define	PCB_NEED_UPDATE(pcb)		\
88 	(PCB_NEED_UPDATE_FPU(pcb) || PCB_NEED_UPDATE_SEGS(pcb))
89 #define	PCB_CLEAR_UPDATE_SEGS(pcb)	((pcb)->pcb_rupdate &= ~PCB_UPDATE_SEGS)
90 #define	PCB_CLEAR_UPDATE_FPU(pcb)	((pcb)->pcb_rupdate &= ~PCB_UPDATE_FPU)
91 
92 /* fpu_flags */
93 #define	FPU_EN		0x01	/* FPU in use (user or kernel) */
94 #define	FPU_VALID	0x02	/* fpu_regs has valid fpu state */
95 #define	FPU_MODIFIED	0x04	/* fpu_regs is modified (/proc) */
96 #define	FPU_KERNEL	0x08	/* Kernel is using the FPU */
97 
98 #define	FPU_INVALID	0x0	/* fpu context is not in use */
99 
100 /* fpu_flags */
101 
102 #ifdef	__cplusplus
103 }
104 #endif
105 
106 #endif	/* _SYS_PCB_H */
107